Definition
The genus Littorina refers to a specific group of small sea snails, commonly known as periwinkles, within the larger family Littorinidae. These snails are specially adapted to thrive in the challenging intertidal zone. They are characterized by their ability to withstand fluctuations in salinity, temperature, and air exposure. They graze on algae, playing a vital role in the intertidal ecosystem. They're like the resilient pioneers of the rocky shores.